Accepting the true doctrine of the Fall is also accepting Jesus as the Christ, the Only Begotten of the Father, and a separate, glorified and eternal Being as the Second God of the godhead. Having faith in Jesus Christ means you know His true identity (John 17:3).
Believing in a Christ that is of one substance with the Father may bring about many blessings and be a strength to the soul, but it is not worshipping God as commanded in Exodus 20:3
“Thou shalt have no other gods before me.”